docs: def parse_shebang_from_file(path):
      """Parse the shebang given a file path."""
      if not os.path.lexists(path):
          raise ValueError('{} does not exist.'.format(path))
      if not os.access(path, os.X_OK):
          return ()
  
      with open(path, 'rb') as f:
          return parse_shebang(f)